Trump, whose 2018 thus far has been dominated by damning allegations contained in the book “Fire and Fury: Inside the Trump White House,” took to Twitter to rail against the book’s author Michael Wolff for the umpteenth time, labeling him “mentally deranged.” He also slammed the media for promoting Wolff’s “Fake Book.”

So much Fake News is being reported. They don’t even try to get it right, or correct it when they are wrong. They promote the Fake Book of a mentally deranged author, who knowingly writes false information. The Mainstream Media is crazed that WE won the election!

Earlier, White House spokeswoman Lindsay Walters said Trump had been briefed on the incident, which she deemed an “emergency management exercise,” despite Hawaii Governor David Ige and other officials revealing the missile alert was sent out in error.

“This was purely a state exercise,” Walters said in a statement, even as Federal Communications Commission (FCC) chairman Ajit Pai tweeted that the agency was launching an investigation into the false alert.

WATCH: How did a ballistic missile alert warning accidentally get sent out in Hawaii?

Trump’s silence on the matter left many Twitter users incredulous.

Wow, as a citizen of Hawaii, I am SO impressed by Trump tweeting about Wolff's book again after the clusterf— that occurred this morning! *sarcasm x infinity*

Trump got plenty of time to tweet about football players kneeling during the national anthem, but can’t seem to find his phone to tell the people of Hawaii that a ballistic misuse is not going to hit their state. Unbelievable.

Trump is much more concerned about Wolff's best-selling tell-all book than he is about his own citizens in Hawaii, who were in a state of panic earlier today because of a supposed ballistic missile headed their way. It turned out to be a false alarm, but that's not the point!